The “devitalisation” before removal of vines infected by viruses (e.g. fan leaf) or phytoplasmas (e.g. Flavescence dorée) is recommended in areas where applicable but is not sufficient and has to be completed by uprooting.

A fallow is highly recommended, if possible with flowering cover plants, and with plants selected for soil fertility, nutrient and water regulation, and biocidal activity against pests and weeds (see also 2.1 and 4.3). In case of infections by root rot agents (e.g. Armillaria spp.) in the previous crop, this practice is crucial.

Control and mowing of host plants of “bois noir” vectors (i.e. nettles for Hyalesthes obsoletus) must be limited to the period where no adult vectors are active in order to prevent their dispersion into the vineyards.

For agents of root rot, a deep tillage should be recommended in order to bring them to the surface and eliminate root residues. The use of antagonists, such as Trichoderma, can be proposed and evaluated to reduce the fungi inoculum.

The use of wood stakes such as chestnut or Robinia pseudoacacia should be avoided, as they could constitute an inoculum source or a conservation substrate for Armillaria root rot.

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